🚙 TRIAL TRUCK CHALLENGE
INTERNATIONAL TRIAL TRUCK SERIES (ITTS)
Where scale meets skill.
Built trucks. Real terrain. No easy resets.
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🏁 OVERVIEW
The Trial Truck Challenge is the core ITTS event — designed to push both driver and machine to the limit.
Expect a true test of:
🎯 Precision driving
⚙️ Throttle control
🪝 Recovery skills
🤝 Teamwork
This isn't a speed race.
The objective is to drive clean, negotiate the terrain and complete the stages with the lowest total score.
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🌍 EVENT STAGES
Drivers take on three demanding off-road stages.
🪨 ROCK & TECHNICAL SECTION
Tight gates, big rocks and precise lines.
Technical terrain where vehicle placement, throttle control and choosing the right line matter.
🌧️ MUD & WATER SECTION
Low grip, deep ruts and unpredictable terrain.
Getting stuck is part of the challenge. Getting out is part of the competition.
🛣️ ENDURANCE TRAIL
Long-distance trail driving where consistency is key.
A longer test of driver and truck where clean, controlled progress matters more than outright speed.
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🏆 SCORING
LOWEST TOTAL SCORE WINS.
Clean driving and smart decisions are everything.
Drivers gain penalty points for mistakes and recovery, while successfully clearing gates reduces their total score.
Time is only used as a tie-breaker.
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👥 EVENT FORMAT
Maximum 20 drivers per event.
Drivers are split into small rotating groups.
All stages run simultaneously.
Minimal waiting. Maximum driving.
👉 If you're not driving — you're spotting or recovering.
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⚙️ VEHICLE CLASSES
ITTS is built around scale trial trucks such as:
FMS Atlas
FMS Unimog
Custom Unimogs
Terranught style trucks
Arkos-style trucks
SCX24-based 6x6 and 8x8 builds
Custom 4x4, 6x6 and 8x8 trial trucks
Other suitable scale trail/trial truck builds
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📏 SCALE CLASSES
CLASS 1 — MICRO TRIAL
Tyres up to 65mm.
CLASS 2 — MINI TRIAL
Tyres over 65mm and up to 75mm.
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🚙 DRIVETRAIN DIVISIONS
4x4 — Standard trial trucks
6x6 — Heavy rigs
8x8 — Extreme builds
Multi-wheel-steer trucks compete within their corresponding drivetrain division:
4x4 + 4x4x4
6x6 + 6x6x6
8x8 + 8x8x8
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⚡ POWER CLASSES
🔹 BRUSHED
Smooth, controlled and scale-focused.
🔸 BRUSHLESS — PRO CLASS
High-performance setups.
Brushless trucks run the same courses but are scored separately.
👉 Brushless = automatically Pro Class.
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🔧 BUILD RULES
ITTS trucks must look and behave like scale trail/trial trucks.
✅ Full scale-style body required
✅ Must represent a real 1:1-style trail/trial truck
❌ No exposed crawler chassis
It should look like a truck, not a competition crawler with a body added as an afterthought.
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🛞 TYRES — GROUP 1
Maximum tyre diameter: 65mm
4x4 + 4x4x4 → Max 65mm
6x6 + 6x6x6 → Max 65mm
8x8 + 8x8x8 → Max 65mm
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🛞 TYRES — GROUP 2
Over 65mm — Maximum tyre diameter: 75mm
4x4 + 4x4x4 → Max 75mm
6x6 + 6x6x6 → Max 75mm
8x8 + 8x8x8 → Max 75mm
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📐 CHASSIS LIMITS
Wheelbase: +15% max
Width: +15% max
Depending on platform
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🤝 BUDDY SYSTEM MANDATORY
No solo driving here teamwork is everything.
Drivers are paired into Buddy Teams.
Your Buddy spots for you and is responsible for recovering your truck when you cannot continue under your own power.
Only your Buddy can recover your vehicle.
ALLOWED RECOVERY METHODS:
🪝 Winch
🧵 Tow rope
🚙 Another truck
❌ NO HAND OF GOD
No picking the truck up.
No putting it back on its wheels.
No carrying it over an obstacle.
No manually repositioning it to get a better line.
👉 If you're stuck — your teammate gets you out.
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🟥 GATES & COURSE RULES
🔴 RED = RIGHT
⚪ WHITE = LEFT
Gates must be taken in order.
The truck must pass through the gate in the correct direction.
Once a gate has been successfully cleared, the driver moves on to the next gate.
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🚩 GATE TOUCH
Gate Touch → +5
A Gate Touch occurs when the competing truck directly contacts a live gate marker.
Continuous contact during the same movement counts as one Gate Touch.
If the truck moves clear and then contacts the marker again, that is another Gate Touch.
Mud, rocks or loose terrain moving a gate marker does not count as a vehicle Gate Touch.
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✅ GATE CLEARED
Gate Cleared → −2
A gate is cleared when the truck successfully passes through it in the correct direction:
🔴 Red on the RIGHT
⚪ White on the LEFT
The gate must be taken in the correct course order.
Successfully clearing gates rewards clean forward progress through the course.
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↩️ REVERSE
Reverse → +1
A reverse is counted when the truck intentionally moves backwards after forward progress.
One continuous reversing movement counts as one reverse.
If the truck then moves forward and reverses again, that is another reverse.
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🪝 WINCH USE
Winch Use → +5
Using a winch to assist the competing truck counts as a winch recovery.
Winching is a legitimate part of ITTS.
Sometimes taking the recovery penalty is smarter than continuing to fight the terrain.
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🔄 ROLLOVER
Rollover — Recovered → +10
A rolled truck is not manually reset.
If it cannot continue under its own power, the Buddy must recover it using an approved physical recovery method:
🪝 Winch
🧵 Tow rope
🚙 Another truck
❌ No Hand of God.
Once successfully recovered, the truck can continue the stage.
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❌ MISSED GATE
Missed Gate → +20
If a driver cannot complete a gate and decides to abandon the attempt, the gate is recorded as missed.
Take the penalty.
Move on.
Keep the trial moving.
A driver does not have to hold up the stage indefinitely fighting one gate.
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🛑 DNF
DNF → +50
DNF means the truck cannot complete the stage.
This may include:
🔧 Mechanical failure
⚡ Electrical failure
🛞 Vehicle unable to continue
🤝 Unsuccessful recovery
🚫 Driver unable to complete the stage
The run ends and the DNF penalty is recorded.
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🎯 BONUS GATES
Bonus Gate → −5
Bonus gates are optional additional challenges.
The driver decides whether the potential reward is worth the attempt.
Normal driving penalties still apply during the attempt.
Your truck. Your line. Your decision.
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🧮 PENALTY & SCORING SYSTEM
🎯 Bonus Gate Cleared → −5
✅ Gate Cleared → −2
↩️ Reverse → +1
🚩 Gate Touch → +5
🪝 Winch Use → +5
🔄 Rollover — Recovered → +10
❌ Missed Gate → +20
🛑 DNF → +50
LOWEST TOTAL SCORE WINS.
Mistakes cost points.
Clean gates bring the score back down.
Drive smart.
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⏱️ TIME RULES
Time is not a primary factor in the Trial Truck Challenge.
A faster run does not beat a cleaner run.
SCORE COMES FIRST.
Time is used only as a tie-breaker when competitors finish on the same score.
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👀 MARSHALS
The Marshal watches the run and records what happens on the course.
The Marshal records:
✅ Gate clears
🚩 Gate touches
↩️ Reverses
🪝 Winch use
🔄 Rollovers
❌ Missed gates
🎯 Bonus gates
🛑 DNFs
Watch the truck.
Record what happens.
Keep the trial moving.
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🏆 AWARDS
🏆 Group 1 Class Winners
🏆 Group 2 Class Winners
🔹 Brushed Champions
🔸 Pro Class Champions
🎨 Best Scale Build
🤝 Trial Brothers Award
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🚙 INTERNATIONAL TRIAL TRUCK SERIES
Where scale meets skill.
Built trucks. Real terrain. No easy resets.
